Siemens SINAMICS S120 Combi User Manual

Cabinet design and EMC
12.4 24 V DC supply
SINAMICS S120 Combi
Manual, 11/2017, 6SL3097-4AV00-0BP7
277
Note
Malfunction because 24 V supply voltage is too low
If the 24 V supply voltage f
alls short of the specified minimum value on a device in the
assembly, a malfunction can occur.
•
Select an input voltage that is high enough for there to be sufficient voltage on the last
device. Do not exceed the maximum value for the supply voltage. If required, supply the
voltage to the assembly at various locations.
Note
Motor holding brake connection
A regulated DC power supply is required to operate motors with a built
-in holding brake. The
voltage is supplied via the internal 24 V busbars. The voltage tolerances of the motor holding
brakes (24
V ±10%) and the voltage drops of the connecting cables must be taken into
account.
Set the DC power supply to 26
V. This ensures that the power supply for the brake remains
within the permissible range when t
he following conditions are met:
•
Use of Siemens three-phase motors
•
Use of Siemens MOTION-CONNECT power cables
•
Motor cable lengths, max. 50 m
1)
1)
70 m for an 18 A supplementary axis

Siemens SINAMICS S120 Combi Specifications

General

Brand	Siemens
Model	SINAMICS S120 Combi
Category	Control Unit
Language	English